According to Christine's research, the concentration of solute in a normal egg is much higher than the concentration of solute in vinegar. Which process is responsible for increasing the size of the egg?

The process responsible for increasing the size of the egg is osmosis. Osmosis is the movement of water molecules from an area of lower solute concentration to an area of higher solute concentration through a selectively permeable membrane. In this case, the concentration of solute in the egg is higher than in vinegar, so water molecules move from the vinegar into the egg, causing it to swell and increase in size.